aboutsummaryrefslogtreecommitdiffstats
path: root/ipc/sem.c
diff options
context:
space:
mode:
authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-20 19:48:14 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:21 +0200
commit41f4f0e2f5f4cd060885405c04214851ffe7b299 (patch)
tree3c465c0218ef422e7d7dd5553c8531479f97d654 /ipc/sem.c
parentnet: socket: add __compat_sys_...msg() helpers; remove in-kernel calls to compat syscalls (diff)
downloadlinux-dev-41f4f0e2f5f4cd060885405c04214851ffe7b299.tar.xz
linux-dev-41f4f0e2f5f4cd060885405c04214851ffe7b299.zip
ipc: add semtimedop syscall/compat_syscall wrappers
Provide ksys_semtimedop() and compat_ksys_semtimedop() wrappers to avoid in-kernel calls to these syscalls. The ksys_ prefix denotes that these functions are meant as a drop-in replacement for the syscalls. In particular, they use the same calling convention as sys_semtimedop() and compat_sys_semtimedop(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'ipc/sem.c')
-rw-r--r--ipc/sem.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index a4af04979fd2..e21ceb8b4af1 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -2120,8 +2120,8 @@ out_free:
return error;
}
-SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
- unsigned, nsops, const struct timespec __user *, timeout)
+long ksys_semtimedop(int semid, struct sembuf __user *tsops,
+ unsigned int nsops, const struct timespec __user *timeout)
{
if (timeout) {
struct timespec64 ts;
@@ -2132,10 +2132,16 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
return do_semtimedop(semid, tsops, nsops, NULL);
}
+SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
+ unsigned int, nsops, const struct timespec __user *, timeout)
+{
+ return ksys_semtimedop(semid, tsops, nsops, timeout);
+}
+
#ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
- unsigned, nsops,
- const struct compat_timespec __user *, timeout)
+long compat_ksys_semtimedop(int semid, struct sembuf __user *tsems,
+ unsigned int nsops,
+ const struct compat_timespec __user *timeout)
{
if (timeout) {
struct timespec64 ts;
@@ -2145,6 +2151,13 @@ COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
}
return do_semtimedop(semid, tsems, nsops, NULL);
}
+
+COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
+ unsigned int, nsops,
+ const struct compat_timespec __user *, timeout)
+{
+ return compat_ksys_semtimedop(semid, tsems, nsops, timeout);
+}
#endif
SYSCALL_DEFINE3(semop, int, semid, struct sembuf __user *, tsops,